| // Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| package com.android.tools.r8.cf.code; |
| |
| import com.android.tools.r8.cf.CfPrinter; |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.CfCompareHelper; |
| import com.android.tools.r8.graph.DexClassAndMethod; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.DexItemFactory; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.graph.GraphLens; |
| import com.android.tools.r8.graph.InitClassLens; |
| import com.android.tools.r8.graph.ProgramMethod; |
| import com.android.tools.r8.graph.UseRegistry; |
| import com.android.tools.r8.ir.conversion.CfSourceCode; |
| import com.android.tools.r8.ir.conversion.CfState; |
| import com.android.tools.r8.ir.conversion.IRBuilder; |
| import com.android.tools.r8.ir.conversion.LensCodeRewriterUtils; |
| import com.android.tools.r8.ir.optimize.Inliner.ConstraintWithTarget; |
| import com.android.tools.r8.ir.optimize.InliningConstraints; |
| import com.android.tools.r8.naming.NamingLens; |
| import com.android.tools.r8.utils.structural.CompareToVisitor; |
| import java.util.ListIterator; |
| import org.objectweb.asm.MethodVisitor; |
| |
| public class CfInitClass extends CfInstruction { |
| |
| private static final int OPCODE = org.objectweb.asm.Opcodes.GETSTATIC; |
| |
| private final DexType clazz; |
| |
| public CfInitClass(DexType clazz) { |
| this.clazz = clazz; |
| } |
| |
| public DexType getClassValue() { |
| return clazz; |
| } |
| |
| public int getOpcode() { |
| return OPCODE; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return CfCompareHelper.CONST_CLASS_COMPARE_ID; |
| } |
| |
| @Override |
| public int internalAcceptCompareTo( |
| CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) { |
| return clazz.acceptCompareTo(((CfInitClass) other).clazz, visitor); |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| // We intentionally apply the graph lens first, and then the init class lens, using the fact |
| // that the init class lens maps classes in the final program to fields in the final program. |
| DexType rewrittenClass = graphLens.lookupType(clazz); |
| DexField clinitField = initClassLens.getInitClassField(rewrittenClass); |
| String owner = namingLens.lookupInternalName(clinitField.holder); |
| String name = namingLens.lookupName(clinitField).toString(); |
| String desc = namingLens.lookupDescriptor(clinitField.type).toString(); |
| visitor.visitFieldInsn(OPCODE, owner, name, desc); |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| void internalRegisterUse( |
| UseRegistry registry, DexClassAndMethod context, ListIterator<CfInstruction> iterator) { |
| registry.registerInitClass(clazz); |
| } |
| |
| @Override |
| public boolean canThrow() { |
| return true; |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| int dest = state.push(builder.appView.dexItemFactory().intType).register; |
| builder.addInitClass(dest, clazz); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, ProgramMethod context) { |
| return inliningConstraints.forInitClass(clazz, context); |
| } |
| |
| @Override |
| public void evaluate( |
| CfFrameVerificationHelper frameBuilder, |
| DexType context, |
| DexType returnType, |
| DexItemFactory factory, |
| InitClassLens initClassLens) { |
| // ..., → |
| // ..., value |
| frameBuilder.push(clazz); |
| } |
| } |